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Re: 5.0.0-rc3 : Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries

From: Philippe Mathieu-Daudé
Subject: Re: 5.0.0-rc3 : Opcode 1f 12 0f 00 (7ce003e4) leaked temporaries
Date: Fri, 17 Apr 2020 12:58:48 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0

On 4/17/20 12:50 PM, Dennis Clarke via wrote:
On 4/17/20 9:28 AM, Philippe Mathieu-Daudé wrote:
On 4/17/20 11:19 AM, Peter Maydell wrote:

Thanks for the report. Did this work with older QEMU?

This is very recent, from commit 0418bf78fe8 last month:

Date:   Thu Mar 19 16:44:39 2020 +1000

     target/ppc: Fix ISA v3.0 (POWER9) slbia implementation

     The new ISA v3.0 slbia variants have not been implemented for TCG,
     which can lead to crashing when a POWER9 machine boots Linux using
     the hash MMU, for example ("disable_radix" kernel command line).

On Fri, 17 Apr 2020 at 10:16, David Gibson
<address@hidden> wrote:

On Fri, Apr 17, 2020 at 10:01:53AM +0100, Peter Maydell wrote:
David -- is this a known bug?

Not known to me.

I see Philippe's just posted a patch for it :-)
We cross-posted at the same time :)

nongnu.org seems somehow laggy.

Patch link:

Running now :

ppc64@styx:~$ /usr/local/bin/qemu-system-ppc64 -machine pseries-4.1 \
-cpu power9 -smp 4 -m 12G -accel tcg \
-drive file=/home/ppc64/ppc64le.qcow2 \
-device virtio-net-pci,netdev=usernet \
-netdev user,id=usernet,hostfwd=tcp::10000-:22 \
-serial stdio -display none -vga none
qemu-system-ppc64: warning: TCG doesn't support requested feature, cap-cfpc=workaround qemu-system-ppc64: warning: TCG doesn't support requested feature, cap-sbbc=workaround qemu-system-ppc64: warning: TCG doesn't support requested feature, cap-ibs=workaround

SLOF **********************************************************************
QEMU Starting
  Build Date = Mar 27 2020 13:57:26
  FW Version = git-8e012d6fddb62be8
  Press "s" to enter Open Firmware.

Populating /vdevice methods
Populating /vdevice/vty@71000000
Populating /vdevice/nvram@71000001
Populating /vdevice/v-scsi@71000002
        SCSI: Looking for devices
           8000000000000000 DISK     : "QEMU     QEMU HARDDISK    2.5+"
           8200000000000000 CD-ROM   : "QEMU     QEMU CD-ROM      2.5+"
Populating /pci@800000020000000
                      00 0000 (D) : 1af4 1000    virtio [ net ]
No NVRAM common partition, re-initializing...
Scanning USB
Using default console: /vdevice/vty@71000000

   Welcome to Open Firmware

   Copyright (c) 2004, 2017 IBM Corporation All rights reserved.
   This program and the accompanying materials are made available
   under the terms of the BSD License available at

Trying to load:  from: /vdevice/v-scsi@71000002/disk@8000000000000000 ...   Successfully loaded

I am not sure what that warning means but I will get the Debian sid
  ppc64le instance running and test a bit.

If the referenced patch removed the warnings, do you mind responding:

Tested-by: Dennis Clarke <address@hidden>

to it?

Thanks for testing it :)

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